/* s_rintf.c -- float version of s_rint.c.
 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
 */

/*
 * ====================================================
 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
 *
 * Developed at SunPro, a Sun Microsystems, Inc. business.
 * Permission to use, copy, modify, and distribute this
 * software is freely granted, provided that this notice
 * is preserved.
 * ====================================================
 */

#include "float.h"
#include "math.h"

static const float
TWO23[2]={
  8.3886080000e+06, /* 0x4b000000 */
 -8.3886080000e+06, /* 0xcb000000 */
};

float
rintf(float x)
{
    int i0,j0,sx; /*lint !e578*/
    float w,t;
    GET_FLOAT_WORD(i0,x);
    sx = (i0>>31)&1;
    j0 = ((i0>>23)&0xff)-0x7f;
    if(j0<23) {
        if(j0<0) {
        if((i0&0x7fffffff)==0) return x;
        STRICT_ASSIGN(float,w,TWO23[sx]+x);
            t =  w-TWO23[sx];
        GET_FLOAT_WORD(i0,t);
        SET_FLOAT_WORD(t,(i0&0x7fffffff)|(sx<<31));
            return t;
        }
        STRICT_ASSIGN(float,w,TWO23[sx]+x);
        return w-TWO23[sx];
    }
    if(j0==0x80) return x+x;    /* inf or NaN */
    else return x;            /* x is integral */
}

